Metal-shaping machine



(No Model.)

13. A. WALKER.

' METAL SHAPING MACHINE.

No. 379,142,. Patented Mar. 6, 1888.

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I nus/Liar. Edward a7. Walker,

N. PETERS. PhotoJ-ilhngnpher. Wlihinglon, D. C,

UNITED STATES PATENT OFFICE.

EDWARD A. WALKER, OF PHILADELPHIA, PENNSYLVANIA.

METAL-SHAPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 379.142, dated March 6, 1888.

Application filed November 1, 1887, Serial No. 253.976. (No model.)

To aZZ whom it may concern:

Be it known that I, EDWARD A. WALKER, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, haveinvented certain Improvements in Metal-Working Machines, of which the followingisaspeciticatiou.

My invention consists of certain improvements in that class of metalworking machines in which the work-carrying bed projects laterally from the main frame, the latter having ways for the guidance of atool-carriage,which likewise projects laterally and reciprocates on said ways, so that its tool acts upon the work on the projecting bed.

The objects of my improvements are to prevent the access of metal chips, cuttings, or other foreign matters to the guideways on the bed of the machine; to prevent the access of oil to the bolt-slots in the frame, work-tables, and carrying-plates; to facilitate the operation of the belt-shifter rod, and, in the case of a machine having a series of independent workbeds, to provide for working with either bed without the necessity of shifting the stops upon the belt-shifter rod.

In the accompanying drawings, Figure 1 is a perspective view of a metal-working ma-' chine of the class to which my invention relates, and showing my improvements. Fig. 2 is an end view of the machine. Fig. 3 is aperspective view, on a larger scale, of part of the machine; and Figs. 4, 5, and 6 are detached views illustrating features of my invention.

A represents the main frame of the machine, which is mounted upon pedestals or feet A, this machine having attached to the front of the same, in the present instance, two plates, l B B, which carry work-tables D D, the main frame, carrier-plates,and work-tables all being provided with undercut grooves, as usual, so as to afford facilities for the proper adjustment I of the parts. 7

On the top of the frame A are formed guide ways a for the carriage F of the tool, the latter being provided with the usual adjustable toolslide, G, and having a nut adapted to a feedscrew, H which is free to turn in suitable bearings carried by the frame A, and has at one end loose pulleys I l and an intermediate fast pulley, J, one of the loose pulleys being driven by a straight belt and the other by a crossed belt, and these belts being controlled by a duplex belt-shifter, so that when the straight belt is on the pulley I the crossed belt will be on the pulley I or J, and when the crossed belt is on the pulley I the straight belt will be on the pulley J or I; or by adjusting the shifter to an intermediate position both belts will be practically free from driving-contact with the pulley J and no movement will be imparted to the feed-screw.

In machines of this sort difficulty has been experienced because of the access of metal chips or cuttings to the guideways a on the main frame of the machine, the construction of the parts being such that cutting very frequently takes place in close proximity to these guideways, so that, unless the attendant is continually on the alert to prevent it, accumulation of the chips or cuttings on the guideways must necessarily take place. In order to overcome this objection l secure to the front. of the frame A a plate, K, which extends from end to end of the frame and up to the under side of the carriage F, to which it fits snugly, as shown in Fig. 2, so that in whatever position the carriage may be the plate forms a guard or shield to prevent the access of chips or cuttings to the guideways. To further protect said guideways from chips or cuttings which might fly up over the end of the carriage and over the top of the plate K, I provide said carriage with an extension, M, which is preferably made in the form of a shallow tray, as shown in Figs. 1 and 2, so that it serves, in addition, as a receptacle for the handtools, which are frequently required in running a machine of this character.

It is also an objection to the ordinary machine that the oil used for lubricating the guideways finds its way to the front of the ma chine and to the bolt-slots in the frame, carrying-plates, and work-table, where, becoming mixed with the chips or cuttings, it clogs said slots and interferes with the ready adjustment of the parts. It will be evident that the use of the guardplate K effectually overcomes this objection.

The belt-shifter is provided with a rod, b, which is free to slide in suitable bearings on the frame of the machine, and on this shifterrod are two sets of stops, d d, one set for each of the work-tables D D, and when the tool is operating upon work on either of the tables the forked end of a tappet-rodf on the carriage works between the stops corresponding to said table, the rod being moved and the belt properl y shifted by contact of the forked end of the tappetrod with the stop at each limit of movement of the carriage.

The tappet-rod is in the present instance adapted to bearingsg on the carriage, in which bearings it is free to slide,so that it may be retracted, as shown in Fig. 5, until its forked end is free from engagement with the stops d or d, the carriage being then shifted from one work-table to the other and the tappet-rod again moved forward into engagement with the stops, as shown in Fig. 4, without any necessity of changing the position of the stops themselves upon the shifter-rod. It is also frequently necessary to move the carriage beyond the table carrying the work-as. for instance, in setting the work in the first instance, or in examining the work during the operation or after it is completed.

The use of the movable tappet-rod permits these movements of the carriage without any disturbance of the stops on the shifter-rod, as will be readily understood.

In order to move the shifter-rod by hand during the operation of the machine, I pro vide an operatiugarm, N, which is secured to a stud, l1, pivoted to a lug. i, on the frame, said arm passing freely through a stud, m, which is pivoted to a collar, n, on the shifter-rod, so i that by moving said handle in one direction or the other a like movementwill be imparted to the shifter-rod, the studs turning on their pivots to accommodate themselves to the different angles of the arm, and the latter sliding in the stud m as it is moved from one position to the other. It will be evident that the same result would be attained if the handle were secured to the stud m and free to slide in the stud h.

The use of the handle N not only gives a leverage for the operation of the shifterrod, and thus facilitates the movement oft-he latter, but it also enables the operator to move the rod from the front of the machine, where he is stationed during the working of the same, and it permits the application of power more effectively than ifthe rod were directly grasped mentof the same.

I have shown my invention as applied to a machine having two projecting work-tables;

but it will be evident that the invention may be used in connection with machines having more than this number of tables, and that some features of the invention are applicable to a machine having but a single table.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a metal working machine having the main frame with top guideways, the tool-carriage adapted to said guideways, and the projecting work table or tables in front of the machine, the combination of said parts with a plate secured to the main frame and extending from the top of the same up to the carriagein front of the guideways, so as to protect said ways, all substantially as specified.

2. In a metal-working machine having the main frame with its top guideways, the toolcarriage adapted to said guideways, and the projecting work table or tables, the combination of said parts with the guard-plate extending from the top of the frame up to the carriage in front of the guideways, and an extension-piece projecting from the carriage, and likewise bearing upon the guard-plate, all substantially as specified.

3. In a metal-working machine having two or more projecting work-tables and atool-car riage guided on said frame, the combination of said parts with a belt-shifter rod having a set of stops for each work-table, and a tappetrod engaging with said stops and mounted on the carriage, so as to be movable into or out of range of the stops, all substantially as specified.

4. The combination of the belt shifter rod, the shifting-handle therefor, and two pivoted studs receiving said handle, one of said studs being carried by the'frame and the other by the shifter-rod, and the handle being free to slide in one of the studs, all substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ED \VARD A. \VALKER.

Vitnesses:

WILLIAM D. CONNER, HARRY SMITH. 

